<?php

function checkDNS($domain, $ip4 = '138.201.86.17', $ip6 = '2a01:4f8:172:21c9::2') {
	if (!preg_match('/(?=^.{4,253}$)(^((?!-)[a-zA-Z0-9-]{0,62}[a-zA-Z0-9]\.)+[a-zA-Z]{2,63}$)/', strtolower($domain))) {
		return ['error' => 'Not valid domain.'];
	}
	$currentip = dns_get_record($domain, DNS_A + DNS_AAAA);
	if ($currentip[0]['ip'] !== $ip4) {
		return ['error' => 'The current ip v4 address of '.$domain.' is '.$currentip[0]['ip'].'. it should be '.$ip4];
	}
	if ($currentip[1]['ipv6'] !== $ip6) {
		return ['error' => 'The current ip v6 address of '.$domain.' is '.$currentip[1]['ipv6'].'. it should be '.$ip6];
	}
	return true;
}

function checkIfInstalled($domain) {
	return true;
}

function checkIfUserExist($user) {
	return true;
}

function generateUserFromDomain($domain, $recursive = null) {
	$user = 'toto';
	return $user;
}

function generatePassword($length = 32, $add_dashes = false, $available_sets = 'luds') {
	$sets = array();
    if(strpos($available_sets, 'l') !== false)
        $sets[] = 'abcdefghjkmnpqrstuvwxyz';
    if(strpos($available_sets, 'u') !== false)
        $sets[] = 'ABCDEFGHJKMNPQRSTUVWXYZ';
    if(strpos($available_sets, 'd') !== false)
        $sets[] = '23456789';
    if(strpos($available_sets, 's') !== false)
        $sets[] = '!@#$%&*?';

    $all = '';
    $password = '';
    foreach($sets as $set)
    {
        $password .= $set[array_rand(str_split($set))];
        $all .= $set;
    }

    $all = str_split($all);
    for($i = 0; $i < $length - count($sets); $i++)
        $password .= $all[array_rand($all)];

    $password = str_shuffle($password);

    if(!$add_dashes)
        return $password;

    $dash_len = floor(sqrt($length));
    $dash_str = '';
    while(strlen($password) > $dash_len)
    {
        $dash_str .= substr($password, 0, $dash_len) . '-';
        $password = substr($password, $dash_len);
    }
    $dash_str .= $password;
    return $dash_str;
}

function createSQLUserAndDatabase($user) {
	$pass = generatePassword();
	return ['database' => 'dbtata', 'user' => 'dbtata', 'password' => $pass];	
}

function createUnixUserWithQuota($user, $quota) {
	$pass = generatePassword();
	return ['user' => 'toto', 'password' => $pass, 'quota' => $quota];
}

function createNginxConfig($domain, $user) {
	
}

function createPhpFpmConfig($user) {
	
}

function copyYesWikiFiles($domain, $user) {
	
}

function copyYesWikiDatabase($databaseModel) {
	
}

function addHerse($id, $pass) {
	return ['user' => $id, 'password' => $pass];
}

function installYesWiki($domain, $quota, $type) {
	$res = checkDNS($domain);
	if (!empty($res['error'])) {
		return $res;
	}
	$res = checkIfInstalled($domain);
	if (!empty($res['error'])) {
		return $res;
	}
	$user = generateUserFromDomain($domain);
	$unixUser = createUnixUserWithQuota($user, $quota);
	$dbUser = createSQLUserAndDatabase($user);
	createNginxConfig($domain, $user);
	createPhpFpmConfig($user);
	copyYesWikiFiles($domain, $user);
	$databaseModel = ($type === 'solo') ? 'modelesolo' : 'modeleferme' ;
	copyYesWikiDatabase($databaseModel);

	$herseUser = [];
	if (!empty($herseId) && !empty($hersePass)) {
		$herseUser = addHerse($herseId, $hersePass);	
	}
	return [
		'domain'=> $domain,
		'type'  => $type,
		'user'  => $unixUser,
		'db'    => $dbUser,
		'herse' => $herseUser
	]; 
}

function removeYesWiki($domain, $user) {
	// enlever la db et le user sql
	// enlever la config nginx et la conf php-fpm
	// enlever le user unix et son home
}